Speed-control mechanism



Nov. 6, 1928.

F. M. ROSENZWEIG SPEED CONTROL MECHANISM Filed June 14, 1924 2 Sheets-Sheet I/VVENTOR Fred MRosenzweig.

' BY Wd-W H/S ATTORNEYS Nov. 6, 1928. 1,690,132

F. M. ROSENZWEIG SPEED CONTROL MECHANI SM Filed June 14, 1924 2 Sheets-Shae: 2

INVENTOR Fred M. Rosenzwizuj.

IS ,4 TTORNEYS Patented Nov. 6, 1928.

U ITED STATES PATENT F mini) M. nosmzwnre, or NIAGARA FALLS, NEW YORK, ASSIGNOR TO THE REGAN SAFETY DEVICES COMPANY; mo, or'nnw Yon-K," 1v. Y., A CORPORATION or NEW v YORK.

Application filed June 1 4,.

This invention relates to (heart of automatic train control, and relates more par: ticularly to automatictrain control systems in which the speed of the vehicle or train is controlled under predetermined roadside or veliicle conditions; and hasspecial' reference to the provision of a novel speed controller mchanism employed in such systems.

' speed'controllfer mechanismconnected to the running gear of the vehicle for direct opera 'oiitherehy the speed controller necha nism beingconstructed and designed to withstand thesevore service conditi onsto which it isl iormally subjected in the movement ottrains and to control automatic train control circuits in ajreliable manner. y I

As i s disclosed and claimedin the copending; ap lication A. G'. Shaver to speed oontrol'er, Sci, No. 3103,1191, filediJune- 10, 19I9, Iit has been demonstrated lthat 01: obtaining, reliability and depend'abilityof operationQ-it is highly desirable to mount the speed controller in traincont-rol systems di directly on a wheel of the vehicle, so that the speed controller elements are"v directly driven from the running. gear; the construction permitting. moreover the arrangement at theele- I ments in a compact manner and the eflicient housing of the same. 'Thedirect mounting and operation. of the speed controller is 'acco'mpl'ished in" the preferred construction connecting or attaching a movable or rotor element to. awheel of theveh-icle orgto the outer end of the axle of, thewheel so asuto be supported by, for rotationwith the wheel,

and by ,mounting a relatively stationary o stator element'in a positionfor cooperation with h the rotor. element, the cooperation be tween the twobeing designed for operating and controlling vehicle circuits In thespeed controller mechanism of my present invention, this general assembly, dis closed in said copending application. is adopted to] retain its, attendant, advantages, thep'resent; invention being directedto im-- provements therein infwhich the rotor and stator'elementslare inductively related so asto eliminate the necessity of: contacting en the controller. n i v To the accomplishment of the foregoing and suchotherobject asmay hereinafter ap pear, my iaWntimronsists in the elemen s induction type of vent-ion in its more generic aspects comprises a rotor R which 18 directly agement 'therebetweenin the operation of.

- sienna-00111 1101. MECHANISM.

1924.; Serial No. 719,948.,

and their relation one to the other, as hereinafter particularly described and sought to be defined in the claims; reference being had to the accompanying drawings Whichshow preferred embodiments of my invention, and

o in which Figs; 1 andl are views showing one form n for my invention in which therotorl and prime desiderat'um of mypresent in: mvention com'prehends tl'l G PIOVISIQII of astator elements are inductively related, and -Figs.. 2 tori inclusive are views showing; modificationsof the invention. 4 Y

Referring first to Figs; 1 and l ioffthe drawing in which I show an eddy current speed controller, the; in-:

attached or connectcd' to the wheel W ofthe vehicle which may he the front wheel or" the pony truckoi? the locomotive, and a stator S which is inductively related to the rotor R, the stator being adapted to he: held relatively station ary duringthe rotation of the rotor R and the Wheel W, the cooperation between the rotor, and the istator being designed-for op-I crating and controlling vehicle carried circults in accordance with predetermined.

speed conditions.

In the preferred construction the rotor R I v :is attached Ior connected to a support; gen

erally designated as 10 which comprises a a side wall portion 10 and a front wallporwall portion 10?" casing section having a rearwall portion 10",,

vehicle W in anyapproved manner. I t i v The stator S preferably is arranged to be. :1

carried by the rotor complishing this: 1

section 11 carried by the'tront; casing wall 10, section 11 being supported in said wall by means of anti-friction bearing means support 10, and for ac-- casing section 11. Desirably the-casing section 1.1 takes theto-rm of a conduit for the providea secondxcasing 12, the stator Sbeing mounted on the second conductors connecting the stator S and the circuit means to be described hereinafter.

In the; form of the invention shown in ,Figs. 1 and 1, the rotor Rcomprises a magnet and the stator S comprises a copper or aluminum cup in which eddy currents are produced when the magnet revolves these eddy currents 'vreacti-ng with themagnetic field of the revolving magnet so as to pro d e t rque ontbeetetor 91 p in t e db rcction of the rotary motion. The stator S is mounted on the casing section 11 so as to permit of a partial rotation thereof, this partial rotation being opposed by the tension of the springs 13 and 13' connecting the stator cup to a stud 14 forming part of a switch or contact member 15, which latter is lined to the casing section 11. The stator S is provided with a complemental switch or contact member 16 arranged normally for engaging the contact fingers 15 and 15 of the switch member 15, the construction be ing such that when the stator S is given a suflicient partial rotation in response to a predetermined speed of rotation of the rotor R, the switch contacts will open either in one or in the other direction, depending upon the direction of rotation of the wheel W; lVith this construction, it will be evident, therefore, that when a predetermined speed of the vehicle is exceeded, a circuit which is normally closed by the switch contacts may be opened to operate train control system's. g

The train control circuits which may be operated are conventionally shown in Figs. 1 and 1 of the drawings, and while I have shown these circuits operated in response to vehicle conditions such as a change of speed of the vehicle, it will be evident that these circuits may be connected to be operated by changes in roadside conditions so that the control of the vehicle may be made responsive to clear, caution or danger traffic conditions. The controlled circuit may comprise a pneumatic valve 17 for-controlling the air brake system, said pneumatic valve being operated by an electromagnet 18 connected in a circuit a having the battery 19, the conductor 20, conductor 21. relay con tact 22, and conductor 23. The relay contact may be controlled by a relay element 24: located in a controlling circuit 1) having a battery 25, a conductor 26, a conductor 27 connecting the relay to the contact finger 1-5 and a conductor 28 connecting the battery 25 to the second contact finger 15.. It will be apparent that with this construction when the speed of the vehicle is below a predetermined limit, the circuits a and b will be closed to maintain the normal operation of the valve 17, while when the predetermined speed is exceeded, the circuit Z) will be opened, opening the circuit a and effecting a deenergization of the magnet 18 and a control operation of the valve 17.

By mounting the speed controller directly on the wheel. of the vehicle, it will be seen that the speed control elements are arranged for direct operation to obtain maximum reliability and dependability in service, the construction also permitting the rotor and stator elements or sections R and S to be compactly arranged and protectively housed in an eflicacious manner.

Referring now to Figs. 2, 2 and 2 of the drawings, I show a modification of the invention in which the rotor and stator elements are of the A. C. generator type. The casing sections and the structureprovided for supporting the rotor and stator are in general similar to that heretofore described, and are denoted by similar reference characters. The rotor R in this form of my invention comprises a permanent magnet having a construction as shown in Fig. 2 of the drawings for producing a revolving field when rotated. The stator S comprises a plurality of electromagnets 29, 29 arranged as shown in Figs. 2 and 2 of the drawings and connected together in a circuit b in series with the relay 24:. This circuit Z) is normally deenergized for closing the valve control circuit (6, the latter circuit being otherwise similar to that heretofore described, the parts of which are denoted by similar reference characters. With this construction when the permanent magnets revolve, an alternating current is induced in the circuit 6, and when the speed of the vehicle exceeds a predetermined limit, this current is of sutlicient magnitude to energize the relay 24 sufficiently to open the contact 22 and operate the valve 17.

Referring now to Figs. 3 and 3 of the drawings, I show a speed control mechanism of the inductor-generator type. The rotor R comprisesa bar of iron having oppositely arranged wings as clearly shown in Fig. 3*

of the drawings, and the stator S comprises two. sets of electromagnets 30, 30 and 31, 31, the first set being connected in series .in a circuit 0 so as to be energized by a battery 32, the second set being connected in series'in a circuit (Z for energizing the relay 2?. With this construction when the iron rotor revolves, the field poles of the circuit 0 will induce an alternating current in the circuit d, and when the predetermined speed is exceeded, this current is of a magnitude sufficient for energizing the relay 24 to operate the circuit a in a manner similar to that heretofore described in connection with Fig. 2 of the drawings.

Referring to Figs. .4 and 4 of the drawings, I show a still further modification of the invention embodying a self-induction type of rotor and stator mechanism. In this form of my invention, the rotor R also comprises a bar of iron having opposite wing sections as shown in Fig. 4, and the stator S comprises a plurality of electromagnets '33, 33 wound so that adjacent magnets have opposite polarities, as shown in Fig. 4 of the drawings, the said magnet-s being arranged in series in a circuit 6, the saidcircuit including a battery 34; and a frequency relay 35. With this construction when the rotor revolves in front of the poles of the magnets 33, the self-induction of the circuit 6 willbe varied, resulting. in the ,superposin g of an alternating current on the direct-current furnished by the battery 34,this alternating current operating. the frequency; relay I Normally the armature 36 .ofthe relay 35is arranged to close the valvecontrolcircuit a having a constructionsimilar to that heretofore described iii-connection with Fig 1 of the drawings, and when a predetermined speed of operation of l-the rotor R is reached, thev frequency relay -35 will 'zmove the armature 36 from the fu ll to the dotted line position shown, openingthe; circuit (1, for deenergizing the electromagnet 18and for'producing the control operation of the air brake valve 17.

While I have shown the preferred forms a speed controller comprising a, relatively movable section connected to saidwheel and carried thereby and a relatively stationary section inductively related to the relatively movable section.

' 2. In a vehicle control mechanism, the combination with a wheel of the vehicle, of a speed controller comprising a rotor section connected to said wheel at the exterior thereof, a stator section inductively related to the rotor section, and circuit means connected to the stator section.

3. In a vehicle control mechanism, the combination with a wheel of the vehicle, of a' speed controller comprising a relatively movable section connected to said wheel and carried thereby, a relatively stationary section carrying magnetic devices inductively related to themovable section and circuit means controlled by the cooperation of said sections. I

4. In a vehicle control -mechanism, the combination with a wheel of the vehicle, of a speed controller comprising a rotor section connected to said wheel and carried thereby and a stator section inductively related to and carried by the rotor section.

5. In a vehicle control mechanism, the combination with a wheel of the vehicle, of a speed controller comprising a rotor section connected directlyto said wheel for rotation therewith, a stator section inductively related to and carried by the rotor section and circuit means connected to the stator section and controlled by the cooperation of said rotor and stator sections.

6. In a vehicle control mechanism, the combination with thetruck of the vehicle, of a speed controller comprising a relatively movable section connected to the truck with the-axis of. the said section aligned. withthe axle of thetruck, and arelatively stationaryv section inductively related to' the relatively movable section, and vehiclecontrol means controlledby the cooperation of the relatively movable sections.

7. In a vehicle control mechanism, the combinationWi-th the truck of the vehicle, of

a speed. controller comprising arotor'yseo,

timrconnected to the tru'ckwvith the axis of the said section aligned with the axle of the truck, a stator section inductively related to the rotor section andycircuit means con nected' to thestator section and controlled by the cooperation ofsaid rotor and state;- sections. v

8. In a vehicle control mechanism,

combination with a Wheel of the vehicle, of a speed controller comprising a support:

attached to for bodily rotation with csaid wheel of the vehicle, a rotor connected to.

the support, a stator carried by said support and inductively related to said rotor and vehicle control means controlled by the coop eration of the rotor and stator.

. 9 9 9. In a vehicle control mechanism, the,

combination with a wheel: of the vehicle, of

a speed controller comprising a casing and support attached to for bodily rotation with said Wheel of the vehicle, a rotor connected to and housed by the support, a stator inductively related to said rotor, and circuit means connected to the stator.

10. In a vehicle control mechanism, the. combination with a Wheel of the vehicle, of i a speed controller comprising a casing and support attached to for bodily rotation with said wheel of the vehicle, a rotor connected to the support and a stator carried by said support inductively related to said rotor, the said rotor and stator being arranged to be housed by said support, and circuit means connected to the stator.

'11, In a vehicle control mechanism, the combination with the truck of the vehicle, of a speed controller comprising a first section attached exteriorly to the truck with the axis of the same aligned with the axle of the truck, a second section adapted to be held stationary during the rotation of the Wheel,

of the same aligned with the axle of the truck, a second section adapted to be held stationary during the rotation of the wheel, bearing means supporting the second section on the first section, a rotor element carried by the first section, a stator element inductively related to said rotor element and carriedby the second sect-ion, and circuit means connected to said stator element and controlled by the cooperation of the rotor and stator elements.

13. In a vehicle control mechanism, the combination with the truck of the vehicle, of a speed controller comprising a first sectionattached exterior-1y to the truck with the axis of the same aligned with the axle of the truck, a second section adapted to be held stationary during the rotation of the wheel, bearing means supporting the second section on the first section, and inductively related rotor and stator elements carried respectively by said first and second sections, the said sections forming a casing for housing the rotor and stator elements.

14:. In a vehicle control mechanism, the combination with the truck of the vehicle, of a speed controller comprising a first casing section attached exteriorly to the truck with the axis of the same aligned with the axle of the truck, a second casing section adapted to be held stationary during the rotation'of the wheel, anti-frictional bearing means supporting the second section on the first section, a rotor element carried interiorly by the first section, and a stator element carrying magnetic devices inductively related to said rotor element carried by the second section.

15. In a vehicle control mechanism, the combination with the wheel of a vehicle, of a speed controller comprising a relatively movable magnetic section connected to said Wheel and carried thereby and a relatively stationary circuit conrtolling section arranged to be influenced by the movement 01 the relatively movable section.

16. In a vehicle control mechanism, the combination with the wheel of a vehicle, of a speed controller comprising a magnetic rotor section connected to said wheel at the exterior thereof and a circuit controlling stator section arranged to be influenced by the rotation of said rotor.

17. In a vehicle control mechanism, the combination with the wheel of a vehicle, of

a speed'controller comprising a magnetic rotor section connected to said wheel at the exterior thereof, a statorsection inductively related to said rotor section and influenced by the rotation of the latter, and circuit means connected to said stator section.

Signed at Niagara Falls, in the county of Niagara and State of New York, this 9th day of June A. D. 1924.

FRED M. ROSENZWEIG. 

